—I think trees ____________ twice a week in such hot weather.
—Yes, I agree. Or they may die without water.
A.must water.B.a(chǎn)re watered.
C.must be planted.D.must be watered.
D

試題分析:句意:--我認(rèn)為,在如此熱的天氣中,樹應(yīng)該一個星期澆兩次水。--是的,我同意。否則他們可能會因?yàn)槿彼廊。分析:考查被動語態(tài)的用法,構(gòu)成:be +done(動詞的過去分詞);本句考查情態(tài)動詞的被動語態(tài)。構(gòu)成must be +done(動詞的過去分詞)。故選 D
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